Momentary control switch



July 31, 1951 s. MOLEDZKY 2,562,567

MOMENTARY CONTROL SWITCH I Filed May 51, 1949 2 Sheets-Sheet l ywI MO Led/27$:

S. MOLEDZKY MOMENTARY CONTROL SWITCH July 31, 1951 2 Sheets-Sheet 2 Filed May 51, 1949 INVEN'I'OR.

fining/1 N0 ZGCLZII'IL ATTORNEY Patented July 31, 1951 UNITED STATES PATENT OFFICE MOMENTARY CONTROL SWITCH Sydney Moledzky, Brooklyn, N. Y.

Application May 31, 1949, Serial No. 96,280

3 Claims.

1 This application is a continuation-in-part of and an improvement upon my co-pending application, Serial Number 78,483, title Contact Switch for Electrical Contacts, filed February 26, 1949, and relates to improvements of the invention disclosed therein, consisting of a momentary control switch.

Generally, the present invention relates to a momentary control switch and more specifically to a momentary switch that is sensitive to sidewise motion, therefore the principal object of the invention resides in the provision of a switch having electrical contacts thereon which will engage and establish a circuit to alarm means when said switch is tilted past a predetermined degree.

Another object provides for means which will visually indicate the tilting of said switch.

A further object provides for the combining of a switch having electrical contacts thereon that are sensitive to sidewise motion with a switch having electrical contacts that are sensitive to forward or rearward motion.

A still further object resides in the provision of adjustable means whereby the angle of engagement may be predetermined.

Other ancillary objects will be apparent from the following description when read in the light of the drawings, in which Fig. 1 is a front elevation of the invention illustrating normal, or inoperative position thereof.

- Fig. 2 is a sectional view thereof taken along lines 22 of Fig. 1.

Fig. 3 is a side view illustrating those contacts closed by forward motion. 7 Fig. 4 is a cross sectional view illustrating in .detail the improved mounting of the pendulum arm.

Fig. 5 is a front elevation of the invention illustrating the electrical contacts sensitive to sidewise motion in engaged relationship.

Fig. 6 is an isometric projection of the U-shaped pendulum and the electrical contacts mounted thereon, and ,1,

Fig. 7 is a wiring diagram of the invention incorporated in an alarm circuit. Y v

The invention comprises a switch having a pair of arms capable of swinging in the same direction in the nature of pendulums and one of said arms also capable of swinging in a sidewise direction relative to the travel of said other arm. The said switch is primarily adaptable to be attached to a vehicle such as an automobileor truckand w i h will operat to sound ana a i h vehi- 2 cle is jarred, moved or if raised by a conventional jack.

The switch comprises a U-shaped frame memher 2 of non-conductive material, as shown in Fig. 1, having a base 4 and a pair of upstanding arms 6 and 8. Said frame member 2 is adapted to be secured to any suitable but inaccessible part of a vehicle.

Mounted in the upper portions of arms 6, 8 is a conducting rod [0 secured at the ends thereof by suitable fastening means l2 to the outer sides of arms 6 and 8.

Journaled on rod I0 is a U-shaped member [6 of non-conductive material and by means of insulated bushings I8 member I6 is positioned between arms 5, 8 of frame 2.

Also journaled on rod I0 and centrally located between the arms of member l6, by means of bushings I9, is an arm I4 of conductive material.

Arm l4 and U-shaped member [6 are capable of swinging in the same direction in a manner like that of a pendulum, however, arm [4, as shown in Fig. 4 is free to swing at right angles relative to the path of travel of member Hi. This is made possible by means of sockets 2| recessed in arm [4 co-acting with the tapered ends of the bushings l8, in effect to form a ball and socket joint, or by enlarging the bore in member l4 and allowing clearance between said member and the bushings I8.

Secured to the base of U-shaped member 16 are two pairs of contacts 22, 24. As apparent from Fig. 6, pair 22 is positioned at right angles to rod III, while pair 24 is positioned on a plane paralleling the axis of rod 10. The individual contacts of each pair are connected together by wire or other conductive means, however, pair 22 is insulated from pair 24, the purpose of which will be hereinafter apparent.

The supporting material for contacts 22 is of light construction and may be readily bent to vary the clearance between arm l4 and said contacts. Likewise, contacts 24 are of the similar type, therefore they too may be adjusted to provide a variable clearance with said arm.

The wiring diagram, Fig, 7, illustrates the electrical circuit employed with the switch to complete an alarm system.

The member 2 is secured in any suitable manner to a stationary part of a vehicle inaccessible to tampering in such a manner that it will permit the vehicle to be left standing at an incline either forward or backward and permit the members l4 and IE to swing free in unison.

However, should the vehicle be suddenly jarred Q it: whi a t like, simil dic nd e 4 descr b d Q c-.. he. o h r n 32, over conductors 34, 36, the coil of relay 38,

over conductors 40, 42, through contacts 22, arm I4, conductors 44, 46 to the negative terminal of battery 26, thus energizing relay 38. The momentary energizing of relay 38 attracts an, 91 1113,?-

ture closing contacts 48, 50. Contacts 48 provide a holding circuit for relay 38 as follows:

From battery positive over conductor: 28, through switch 30, switch 32, over conductors 34, 9 5351 191 5 3% q iduqtq s clasped contacts 48, conductors 54, 46 to negat e:

ca -tes s 5;"; r mpl ed o close:

by a jack or other device, for the. purpos of rec insa i e by someone. ot: Q- uthar ged a se nd alar a it. would; e eemrle cd a .icl-v lows: 1

From battery positive, ove conductor} 23,

tar-Ouch s tch s 9 mus ino s 4 i l i Q relay onduc tit; i21r sl4: and rm relay 58. l V Bela 5,8; et tes a plural y, con acts 59 a d; ne nai oi; whic tablishes a holdin similar to, ha an Qff contacts encircu t fo said, re ay: n

sa edbr he eners'izinaoirs y 8,v c m letes th oi g at, Thiscircuitisasioll w z Frombattery. positive. over conductor: 2%}, through switch-13d; switch (contacts CIOSBdiQby 46 to negative, thereby. lighting lamp 6&5 and warning the operator tov slow the vehicle. 66 may be. conveniently mounted: onthe dashboard; of the vehicle in a location-thatcouldabe readily observed:

7 Switch 3-1 is included, to providea means for disabling the 'entire system, .and isthe key- I operated-type. This allows repairs; etc! tobe-ac complished wi-thout sounding the-ialarinl WhileI have shown and described the preferred embodiment of the invention, it is" understood that many changes or alterations could be made without deviating from the scope" ofthe inven ttion, in which I: claim: 3

1. A multiple switch-comprising-a first peI-idu lum member, a. second pendulum member; said pendulum members of. dissimilar weight. and

Q-nce ti-v. thus were? ns:

Lamp

dottedli-ne, Fig. 7 ),,'.conductor iii-lamp 6.6, con- 7 ,ductori 68,, contactsl lahd arm. I14, conductors 4, 1,

pendulum memberand. the contacts 0nd plurality ofrcontacts;

journaled on a common rod, a plurality of nonconducting spacers for positioning said pendulum members on said rod, two of said spacers having tapered extremities co-acting with similarly formed recesses in said first pendulum member to provide a ball and socket connection, said rod journaled in a pair of upstanding arms secured to a base member, a plurality of contacting surfaces on said first pendulum member, .a first plurality of contacts mounted on; said second pendulum member; a second plurality of contacts mounted on said second pendulum member insulated from said first plurality of contacts, said first plurality of contacts engageable with said contacting surfaces when th moment of inertia 'ot-said first pendulum member is greater than the moment of inertia of said second pendulum members, and said'second plurality of contacts on said second pendulum member are eng-ageable with said contacting surfaces of said first pendulum; member s d; ba e m e si i nee i- 111 1;. member). .l pend. memb rs-bi: d innmaled conducting spacers for positioning,

111111 memb rs; on: said IQ-Q5 two; of i havin tape larly formed b r-tqn v de r-Qd' iourna-led. anai: ofup cured tola base m mber, ap u al X'Q E'QD i surfaces. ,on1 said pluralitieoiiaadjustab ecan at s second pendulum member, a second plural mzinember; ins ed tram.- aid. of; contac s; saidlur l i icf c a eablewith. said: con aeting unfi moment; orincritial oizsaidsfits en ber is"greater. than Jth i mome tof. rntiai second pendulum members, andtsaid secc ralityof; contactsaon saidse cndz pcndu ber are engageablewithz said contac ing s face of said first pendulum-mem er when; said-: base member is tilted'sidcwagvsgtoi a nredet miued gree, said degree predetermined, vaigying-the gap between said contacting surfaces-.oiisaid first of said s'ec- 3. A multiple switch comprising a firstlpendulu-m member, a secondl pendulum member; said pendulum members of dissimilar weight and journaled on a commonrod; a pluralitybf'nonconducting spacers for. positioning said pendulum members on; said: rod; said first pendulum members having 'anaperture of greater: diameter than that of said rod passing therethrough, said 'rod journaled in a pair'otupstanding arms secured to a base memben a'pluralityof contactingsurfaces on said first: pendulummember,- a first plurality of: adjustable; contactsmounted on said second pendulum member, a second plurality of adj us'table contacts mounted on s'ia'idsecond pendulum membei insulated from-said I first; pluralityof contacts, 7 said first-plurality of contactsengageable with saidccntacting 'suriaces when th moment; of inertia of -said first? pendulum member -1sg'reaterthan the moment-of; inertia-'of sa'id second pendulum members, and said'fsecond plu- 5 6 time, said degree predetermined by varying the UNITED STATES PATENTS gap between said contacting surfaces of said first Number Name Date pendulum member and the contacts of said sec- 1,305,352 Getten June 3 1919 0nd plurality of contacts- 5 2,328,215 Jacobs Aug. 31, 1943 2,370,497 Shanklin Feb. 27, 1945 SYDNEY MOLEDZKY- 2,385,707 Johnson Sept, 25, 1945 2,448,597 Jol-ley et a1. Sept. 7, 1948 REFERENCES CITED Th f 11 1 f f d i th FOREIGN PATENTS e 0 0 he re erences are 0 recor n 9 file of this patent: 10 Number Country Date 408,886 Great Britain Apr. 19, 1934 

